Resilient motor mounting



RES ILIENT MOTOR MOUNTING Filed Aug. 21,' 1937 UNITED STATES PATENTOFFICE 2.138.801 nnsnmr Moron. Mourzrrisltv John I A. Castrloone,

Peoria. Ill.. assignmto poration of Illinois Application Anm 21, 1931.serial No. 160,213

3 Cldml.

This invention relates to motor mountins and. more particularly, to amounting for electric and other motors and adapted to absorb vibrationsdue to various causes such as torque fluctuations,

5 unbalanced mechanical and electrical conditions and so forth. Theinvention will be exemplined in connection with an electric motorarranged to drive an electric ironing machine but application of theinvention to other machines will be obl vious.

Where, in machines such as electric ironers, the housing for themechanism includes panels or the like composed of one or'more sheets ofmetal or other composition and where the motor l is mounted directlyupon the machine housing or frame, any unevenness of operation of themotor may be transmitted to the frame or housing and the panels or otherparts which may vibrate in turn within or without the audible range.Whether the vibration of the machine is audible or not, it is usuallyobjectionable to the operator. Where the vibration arises in such manneras to tend to pass through the rotor of the motor to the machine parts,it may be controlled and absorbed to a very large extent by theprovision of a resilient coupling or the like between the motor shaftand the driven mecha-a nism but this does not solve the problem ofdamping or absorbing vibrations transmitted or tended to be transmittedthrough the motor casing or stator to the machine.

It is, therefore, one of the primary objects of the invention to providea motor mounting of such character that all of the vibrations whichmight arise within the motor will be damped or absorbed before reachingthe machine upon which themotor is mounted. In this connection it may benoted that vibrations arising within the machine are damped or absorbedbefore reaching 4the motor. y

Another object is to provide a mounting, of

\the character described, of economical construction yet one which willbe sturdy and eiiidlent in operation.

Further objects as wen as the advantass and uses of the invention willbecome apparent and will be understood after reading the followingdescription and claims and after viewing the drawing in which:

5i) Fig. 1 `is a top plan view of a motor mount or.

support constructed in accordance with a preferred form of theinvention, parts being broken away to show other parts Ain section, andan electric motor being shown-below the support.

Fig. 2 is an elevation view of the motor'and its mount shown in Fig. 1.certain parts being broken away and certain other parts being in sectionto show the construction, the view of the support being takensubstantially along the line 2-2 of Fig. 1. 6

A portion of the gear housing of an ironing machine is shown at 3 vandis illustrated as including bosses I of which there may be four. Thebosses 4 are drilled and tapped to receive machine bolts or machinescrews 5 which pass m through suitable apertures in bosses i of amounting base member o r plate 1 and secure the base member or plate tothe bottom of the ironing machine gear case housing. The base member orplate i may be made in any suitable 15 form in plan but is provided witha central aperture 8, shown as square in this embodiment, through whichthe motor shaft 9 of a motor, generally designated I0, may pass.

vSurrounding the opening 8 is a depending cir- 20 cular ange 9' which atsuitably'spaced places is enlarged or thickened as at ll and thereatdrilled for the reception of bolts I2 which pass therethrough and serveto secure a stamped metal retaining member I3 generally of annulus 25 orring-shape thereto. The retaining member Il has a central openingconforming in shape (in this case) to the opening 8 and the opening isbounded by an upwardly extending ilange ill while at its outer peripherythe member a circumferentially depending nange i0". flanges iB' and i0"lend strength to the member i3 and aid in centering the member withrespect to other parts. Member I3 together with the circumferentialdepending flange 9, form an outwardly opening circular groove or recesswithin which a rubber or rubber composition or other resilient materialring Il is disposed. silient ring il may be tensioned to some degree andcemented in the recess or it may be disposed in the recess withoutcementing it therein. However, it has been found preferable to make theinternal diameter of the ring slightly greater than the diameter of therecess at its bottom and thereafter to place the ring under Ycompression rather than under tension within the recess with or withoutcementing.

'Ihe resilient ring Il is, in turn, circumferentiallygrooved or slottedas shown at Il for the reception of the inner perimeter portion I0 of abell-shaped stamping or the like i1 of ring or annulus shape in plan andwhich at its outer perimeter portion is indented at suitably spacedplaces I8 for the reception of the heads or cap screws Il which passthroush suitable apertures .cement these parts together.

in the member I 'I and intothe end bell 2| of the housing of the statorof the motor I and through the stator into the opposite bell of thestator housing. i

The assembly of the mount is relatively simple and'therefore will bedescribed very briey.

The rubber or other resilient ring I4 is assembled with the supportingmember or annulus il with the perimeter I6 of the latter disposed Vinthe groove I of the former. The :Cit may be such as tightly to clamp therubber upon the perimeter `IS but it may be preferable also toThereafter the ring II- is placed about the flange 8 and the retainerring I3 is put in place and secured by A bolts I2. For the purpose ofattaching the supone another and from the axis of motor shaft 9,

, ber or the like.

Dort or mount assembly to the motor by cap screws I9 which are quitelong, the base member 1 may be provided with holes 22 which may bedrilled or otherwise formed and through which the cap screws may bepassed and secured in place. Thereafter the motor and'mount may besecured -by bolts 5 to' the machine part 3.

e Inasmuch as the cap screws I9 pass through the end bells of the motorand through the stator to'hold these parts in assembled relation, andinasmuch as they are centered equidistant from their engagement with thebell-shaped supportlng member I1 will center the motor shaft withrespect to thecircular perimeter vII and therefore with respect to theresilient ring Il and the base member 1. The shaft 9, on the other hand,will normally =be connected with the driven mechanism through aresilient coupling mem- Consequently, fluctuations in torque or anyunbalanced condition of a mechanical or electrical nature, tending toset up vibrations in the motor housing or stator will in no wise affectvibration of the base I or the machine frame or housing 3. The resilientor other material ring I4 absorbs or damps out the vibrations and leavesno metal to metal contact i base member 1, the resilience -of ring I4being suilcient to permit this action.

While -I have illustrated and described what is at present a preferredembodiment. of the irlsucesor vention, I ve done so merely forillustrative purposes and therefore do not desire to be limited exceptby the spirit of the invention and the scope of the appended claims.

I claim:

1. A motor mounting for suspending an elec-- tric motor with its driveshaft disposed vertically; a base member having outwardly extendingbolting lugs, a circular right angle ange extending inwardly anddownwardly from said lugs, and bolting bosses inside said flangeextending downward the i'ull length thereof; a. rubber ring with anoutwardly opening recess adapted to fit over said circular ange; aclamped support member adapted to clamp the rubber ring inA the rightangle ange of the base member by bolts through said inside bolt bosses;and an annular motor support member adapted to be bolted to the motor onits outer periphery and clamped by its inner periphery in the rubberring recess, the last named connection being the only connection betweenthe motor and its support.

2. A motor mounting for suspending an. electric motor with its driveshaft disposedv vertically; a base member having outwardly extendingbolting lugs, a circular right angle flange extending inwardly anddownwardly from said lugs, and bolting bosses inside said liange; arubber ring-with an outwardly opening recess adapted to t over saidcircular iiange; a clamped support member adapted to clamp the rubberring in the right angle ange of thel base member by bolts through saidinside bolt bosses; and an annular motor support member adapted to bebolted to the motor on its outer periphery and clamped by its innerperiphery in the rubber ring recess, the last named connection being theonly connection between the motor and its support.

3. A motor' mounting for suspending an electricv motor with its driveshaft disposed vertically; a base member having outwardly extending boltsupporting lugs and an inwardly projecting iiange with bolting bossestherein; a circular right angle ange; a rubber ring with an outwardlyopening recess adapted to iit over said circular flange; a clamp supportmember adapt'- ed to clamp the rubber ringv in the right angle ange; andan annular motor support member adapted to be bolted to the motor on itsouter periphery and clamped by its inner periphery in the rubberv ringrecess, the lastnamed connection being the only connection betweenthemotor and its support.

' JOHN A. CASTRICQNE.

